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5x-3(2x+1)=25^-3x
We move all terms to the left:
5x-3(2x+1)-(25^-3x)=0
We multiply parentheses
5x-6x-(25^-3x)-3=0
We get rid of parentheses
5x-6x+3x-3-25^=0
We add all the numbers together, and all the variables
2x=0
x=0/2
x=0
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